EP0586982B1 - Dispositif de mesure ampérométrique comportant un capteur électrochimique - Google Patents
Dispositif de mesure ampérométrique comportant un capteur électrochimique Download PDFInfo
- Publication number
- EP0586982B1 EP0586982B1 EP93113710A EP93113710A EP0586982B1 EP 0586982 B1 EP0586982 B1 EP 0586982B1 EP 93113710 A EP93113710 A EP 93113710A EP 93113710 A EP93113710 A EP 93113710A EP 0586982 B1 EP0586982 B1 EP 0586982B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor
- electrode
- working electrode
- amperometric
- substrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000012528 membrane Substances 0.000 claims abstract description 42
- 239000000758 substrate Substances 0.000 claims abstract description 33
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- 239000007788 liquid Substances 0.000 claims description 23
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- 229910052751 metal Inorganic materials 0.000 claims description 4
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 17
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052801 chlorine Inorganic materials 0.000 abstract description 7
- 239000000460 chlorine Substances 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 abstract description 5
- 239000003651 drinking water Substances 0.000 abstract description 3
- 235000020188 drinking water Nutrition 0.000 abstract description 3
- 238000000206 photolithography Methods 0.000 abstract description 3
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 239000000017 hydrogel Substances 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
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- -1 polysiloxane Polymers 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 description 1
- 102100026735 Coagulation factor VIII Human genes 0.000 description 1
- 206010019345 Heat stroke Diseases 0.000 description 1
- 101000911390 Homo sapiens Coagulation factor VIII Proteins 0.000 description 1
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 208000007180 Sunstroke Diseases 0.000 description 1
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- 210000000056 organ Anatomy 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229920002338 polyhydroxyethylmethacrylate Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/404—Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid, e.g. Clark-type oxygen sensors
- G01N27/4045—Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid, e.g. Clark-type oxygen sensors for gases other than oxygen
Definitions
- the present invention relates to a device amperometric sensor whose sensor forms a cell electrochemical miniature and which is intended to detect or to measure the content of an redox substance in liquid.
- Such sensor devices are used in particular, although not exclusively, to measure the content of chlorine in drinking water.
- a silicon substrate 2 cut after treatments appropriate photolithographic of a plate of silicon like the techniques used for the manufacture of integrated circuits and the like.
- the substrate 2 is coated with a layer 3 of silicon oxide (Si0 2 ) on which is deposited a layer 4 of an insulator such as aluminum oxide (Al 2 0 3 ).
- the known sensor also includes three electrodes 5, 6 and 7 respectively forming a working electrode, a counter electrode and a reference electrode which are produced in the form of deposited ribbons, also by photolithographic techniques, on the layer insulation 4.
- the electrodes 5, 6 and 7 are then covered a diffusion membrane 8 formed by a material organic such as poly HEMA hydrogel or the like (see the above article).
- This membrane deposited and polymerized preferably by photolithographic techniques, is intended to guarantee uniform contact without turbulence of the fluid to be analyzed with the electrodes.
- the electrodes 5 and 6 are made of platinum and that the electrode of reference 7 is in silver coated with a weak layer of silver chloride (AgCl).
- the amperometric sensor device comprising this sensor combined with a so-called “potentiostat" circuit, which is connected to the latter, allows the content of redox substance in a liquid (e.g. chlorine content in water) by measuring the current electric generated at the working electrode 5 of the sensor.
- a liquid e.g. chlorine content in water
- the sensor thus designed, although operating from satisfactory in principle, presents some disadvantages.
- the dimensions of the electrodes (which have a length of only a few millimeters and a width of the order of a tenth of a millimeter) can be determined with good precision thanks to photolithographic techniques, it is not the same for those of the encapsulation 11. Since this encapsulation 11 must isolate the non-active conducting parts of the electrodes 5, 6 and 7 from the liquid to be analyzed, it should preferably extend slightly over the hydrogel layer constituting the diffusion membrane 8.
- the overflow zone is indicated by the distance d and has a front edge 12 whose exact location relative to the diffusion membrane is difficult to control with precision. In other words, the distance d can vary considerably from one sensor to another. However, this distance ultimately determines the area of the area exposed to the liquid and therefore the active measurement surface at which the electrochemical current is generated, so that the intensity of this current, all other things being equal, will differ from one sensor to another.
- this surface active is as large as possible for dimensions sensor data.
- the front edge 12 of the encapsulation should be closest possible from the rear edge 13 of the membrane 8. But then, the liquid to be analyzed may leak under this edge and causes the production of leakage currents between parts of the electrode tapes located behind the membrane 8 and therefore should not normally participate in the production of the electrochemical measurement current.
- the most important drawback of the device anterior is that the area of the active surface of the working electrode cannot be determined with precision so that the precise calibration of each sensor is required and that the interface between the membrane and encapsulation is a source of disturbances.
- the object of the invention is to remedy the drawbacks of the sensor device described in the aforementioned article.
- the area of the active surface of the working electrode is only defined by the area of its conductive part at the surface substrate, area whose dimensions are determinable with great precision because they are defined during the photolithography process used to create the electrode on the surface of the substrate.
- any amount of electrochemical current generated at the surface of the working electrode can be taken in account for the measurement excluding any current of flight.
- connection means comprise at at least one conductor connected to said working electrode and passing through said structure to a level underlying the active surface thereof, extending at least beyond from the periphery of said diffusion membrane.
- This feature also helps prevent conductive parts of the sensor other than those forming its working electrode do participate in the production of electrochemical current, the organs of connection leading from the periphery of the membrane to the sensor connection terminals can easily be covered by encapsulation which, in this case, will not be able to influence the extent of the active surface of the sensor.
- FIGs 3 and 4 represent an amperometric sensor device 20 designed according to the preferred embodiment of the invention.
- This device first includes the actual sensor 21 as well as a measurement circuit 22 which is represented on Figure 3 according to an extremely simplified diagram.
- the Figure 4 is a sectional view of the sensor 21 on which the thicknesses of the various layers are not represented with their exact proportions so to improve the clarity of the representation.
- the sensor 21 comprises a substrate 23, made of silicon for example, cut, after the appropriate photolithographic treatments, from a silicon wafer in the usual way in the technique of manufacturing semiconductor components.
- the substrate 23 is covered with an insulating layer 24, preferably made of silicon oxide (SiO 2 ).
- This layer is in turn covered by another layer of insulator 25, made of silicon nitride (Si 3 N 4 ) for example, layer on which is provided a configuration of connections 26 forming part of the connection means connecting the sensor properly said 21 to the measurement circuit 22.
- the configuration of connections 26 is produced in the form of several polysilicon tracks, the shape of which will be described later.
- a third insulating layer 27 preferably made of silicon nitride (Si 3 N 4 ), and in which several openings 28 are made, the connection configuration therefore being underlying the upper surface of the sensor.
- Each of these openings 28 has a determined shape and it receives a deposit of metal intended to constitute an electrode of the sensor 21.
- a first of these deposits forms the electrode of work 29 of the sensor, preferably made of platinum.
- this working electrode 29 is circular in shape and is located in the center of the plate above a contact area 26a in 26.
- Connection configuration polysilicon shown in Figure 3 the contact area 26a is connected to a polysilicon ribbon composed of the branches 26b and 26c, the branch 26c ending in a terminal of connection 26d appearing on the upper surface of the third layer of insulation 27.
- this counter electrode is, in this example, arcuate in shape and extends almost all around the working electrode 29 above a 26e polysilicon contact area which is in contact with a polysilicon conductive tape of which branches 26f and 26g lead to a connection contact 26h also appearing on the upper surface of the insulation layer 27.
- a third metallic deposit in silver covered with a very thin layer of silver chloride (AgCl), fills the third opening in the insulating layer 27 and constitutes the reference electrode 31 of sensor 21.
- the reference electrode is located above a contact zone 26i made of polysilicon which is also connected to a polysilicon contact strip, composed of two branches 26k and 261 leading to a contact 26m connection appearing on the upper surface of the insulating layer 27.
- the working electrode 29 is covered with a diffusion membrane 32 constituted by a hydrogel made preferably poly-hydroxyethyl methacrylate (polyHEMA).
- polyHEMA poly-hydroxyethyl methacrylate
- the role of this membrane has been described in detail in the aforementioned article. Its main purpose is avoid turbulence of the liquid to be analyzed above the working electrode 29 and it also allows prevent dirt from settling on it from the liquid to measure.
- the chemical body which we have just indicated for the membrane is only one possible example, any other substance fulfilling the same role that can be used. However, it is advantageous if the substance can be deposited using photolithographic techniques conventional and be cured by sunstroke, which is the case of poly-HEMA.
- the diffusion membrane 32 covers fully working electrode 29 and overflowing even from the outer periphery of this electrode which allows to precisely define the surface area active of this electrode.
- the membrane 32 is exposed to the liquid at analyze by the totality of its discovered surface.
- Figures 3 and 4 also show that at the arrangement just described can be added a gasket 33 fixed around the arrangement sensor electrodes on the upper surface of the insulating layer 27, this lining being able to be formed with a polysiloxane, for example.
- the sensor 21 is connected to the measurement circuit 22 which forms a so-called "potentiostat" circuit (FIG. 3 shows a very simplified diagram thereof).
- the working electrode 29 is connected, via the contact 26d, to an instrument 34 for measuring current which is also connected to ground.
- the reference electrode 31 is connected, via the contact 26m, to the inverting input of an operational amplifier 35, the direct input of which is connected to an adjustable voltage source 36 also connected to ground.
- This source 36 makes it possible to adjust the bias voltage U p present between the counter-electrode 30 and the working electrode 29.
- the senor 21 constitutes a micro-cell electrochemical, the electrochemical reaction with the fluid to be analyzed due to the presence of the substance oxidoreducible causing the production of a current electrochemical I which is measurable by the instrument of measure 34.
- amperometric sensor device that we have just to describe is particularly suitable for measuring of the chlorine content of drinking water but it's fine understood that by choosing the metals of the sensor electrodes and bias voltage applied to the working electrode, one could, by starting from the same inventive concept, making devices sensors capable of detecting in water or in other liquids than water, substances other than chlorine.
- Figure 4 clearly shows the layout essentially circular of the electrodes 29, 30 and 31. This arrangement is very advantageous in that it leads to better occupation of the surface of the substrate 23 for a maximum surface of the electrode work 29 whose area essentially determines the intensity of the measurement current.
- Figures 3 and 4 also show that only the surfaces of the membrane, of the counter electrode and the reference electrode, useful for measurement are in contact with the liquid to be analyzed, excluding all other means of connection which ensure the connection of the electrodes with the measurement circuit 22.
- the seal 33 it is easily possible to seal the measurement area (i.e. the area where the electrodes are located), the space above the rest of the substrate 23, and in particular the one in which the visible contacts 26d are located, 26m and 26h which are used to make the connection sensor 21 with the measuring circuit 22.
- the measurement area i.e. the area where the electrodes are located
- the space above the rest of the substrate 23 and in particular the one in which the visible contacts 26d are located, 26m and 26h which are used to make the connection sensor 21 with the measuring circuit 22.
- FIGS 5, 6 and 7 show three examples different electrode configurations that can be used on the substrate of the amperometric sensor.
- a substrate 40 has four elementary working electrodes 41a to 41d arranged at four corners of the substrate surface and covered each by an elementary diffusion membrane 42a to 42d.
- a cross-shaped counter electrode 43 is also present on the substrate as well as a reference electrode 44 which is placed near one of the substrate angles.
- the manufacturing technique of such sensor is very similar to that using which is made the sensor shown in Figures 3 and 4 and we therefore will not return to it again.
- each elementary membrane 42a to 42d is arranged in the same way and plays the same role as the diffusion membrane 32 of FIGS. 3 and 4 so that the same favorable results inherent in the invention are obtained here.
- a substrate 50 has a working electrode 51 in the form of a comb with teeth extend parallel to each other towards one of the edges of the substrate and to which a counterelectrode is contiguous 52 which extends along the opposite edge of the substrate 50.
- a reference electrode 53 is provided near from one of the angles of it.
- the working electrode 51 in the shape of a comb is covered with a membrane of broadcast 54.
- FIG. 7 another variant has been represented. in which it is assumed that the counter electrode and the reference electrode are physically separated from the substrate 60 on which only one electrode has been provided work 61 carried out in the same way as that of the figures 3 and 4.
- a diffusion membrane 62 covers the electrode 61 by projecting slightly from its outer periphery.
- Figures 8 and 9 show a first application practicality of the amperometric sensor device according to the invention.
- a stylus 70 which can be connected by a cable 71 to a housing (not shown) comprising the measurement circuit, this set can be used to measure punctually the gas content of a liquid. Such together could be made portable and easily handy to be used when checking the chlorine content in swimming pool water, for example.
- a small pipe 72 forming a shield and made for example of aluminum, has at one of the its ends a plug 73 in which is mounted a support 74.
- a sensor 75 of the type from that shown at 21 in Figures 3 and 4.
- the support 74 is a circuit printed with three connection tracks 76 which, by soldered wires 77 are respectively connected to the three electrodes of the sensor.
- the trim seal 33 of Figures 3 and 4 is replaced by a bead 78 of an insulating material which is placed on the sensor 75 substrate, the sensor electrodes and especially the working electrode covered with its diffusion membrane being exposed to the fluid to be analyzed when the stylus 70 is immersed therein.
- the bead 78 all other conductive parts, and in particular the contacts of connection ensuring coupling with the measuring circuit are here covered by the bead 78.
- the aluminum pipe 72 is crossed by the cable 71 which is a three-wire connection establishing the connection between support 74 and the measurement circuit (not shown in these figures).
- FIG. 10 shows another way of using the amperometric sensor device according to the invention, for the purposes of continuous monitoring of the content of redox substance in a liquid circulating in a pipe 80.
- a support 81 comprising a tap 82 through which an amperometric sensor device of the type can be installed shown in Figures 8 and 9.
- the measuring device can easily be placed in the piping or be removed by acting on the valve 82, without the liquid escaping from the piping.
- FIG 11 shows another way to use the sensor device according to the invention.
- a standardized housing 90 of the DIL type with sixteen pins usually used for integrated circuit components.
- the housing 90 is placed, for example on a support in the form of a bracket 91 to which is fixed a cylindrical nozzle 92 to two pipes concentric 93 and 94 which are respectively connected two pipes 95 and 96 intended to be connected to inlet and outlet pipes (not shown) of the liquid to be analyzed.
- the external pipe 94 is supported on the lining seal 33 which surrounds the active part of the sensor 21, while the end of the internal pipe 93 is slightly behind the active surface of the diffusion membrane.
- the liquid to be analyzed can flow continuously of inlet manifold 95, through the pipeline internal 93, through the chamber provided above the diffusion membrane, and through the pipeline 94 to the outlet tubing 96.
- the device amperometric according to the invention can therefore deliver in these conditions a permanent signal which is a function direct content of redox substance in the liquid to be analyzed.
- the signal in question can be operated in any suitable way, by example serve to trigger a warning, when the content of redox substance exceeds a value allowed, to serve as actual value in a loop of setting to control the substance content redox as a function of the deviation from this value by relative to a setpoint etc.
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Immunology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Secondary Cells (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
- Measuring Leads Or Probes (AREA)
Description
- un substrat isolant
- un jeu d'électrodes composé d'au moins une électrode de travail, d'une contre-électrode et d'une électrode de référence, au moins ladite électrode de travail étant configurée sur ledit substrat isolant,
- une membrane de diffusion déposée sur au moins une partie dudit substrat, et
- des moyens de connexion pour relier les électrodes audit circuit de mesure,
- ladite membrane de diffusion recouvre entièrement et uniquement la partie conductrice active de ladite électrode de travail en débordant par toute sa zone périphérique, et
- en ce que ladite membrane de diffusion, ladite électrode de référence et ladite contre-électrode sont entièrement exposées pour qu'au cours du fonctionnement dudit dispositif, elles soient en contact par toute leur surface avec le liquide à analyser.
- la figure 1 est une vue en coupe schématique d'un dispositif capteur ampérométrique réalisé selon la technique antérieure;
- la figure 2 est une vue en coupe prise selon la ligne II - II de la figure 1;
- la figure 3 est une vue en plan d'un capteur ampérométrique combiné à un circuit de mesure pour former le dispositif capteur selon l'invention;
- la figure 4 est une vue en coupe schématique prise selon la ligne IV - IV de la figure 3;
- les figures 5, 6 et 7 sont des vues schématiques en plan de trois autres configurations du capteur pouvant être utilisé dans le dispositif capteur suivant l'invention;
- la figure 8 montre une vue schématique en coupe axiale d'un capteur selon un montage pratique;
- la figure 9 est une vue, à plus grande échelle que celle de la figure 8, du capteur utilisé dans le dispositif de la figure 8, la vue étant prise selon la ligne IX - IX de celle-ci;
- la figure 10 montre un mode d'utilisation du capteur des figures 8 et 9; et
- la figure 11 montre une autre application du dispositif capteur selon l'invention.
Dimensions du substrat 23 | 4 mm x 4,4 mm |
Surface de l'électrode de travail | 1,54 mm2 |
Surface de la contre-électrode | 1,37 mm2 |
Surface de l'électrode de référence | 0,16 mm2 |
Epaisseur du substrat 23 | 380 µ |
Epaisseur de la couche d'isolant 24 | 6000 Å |
Epaisseur de la couche d'isolant 25 | 2000 Å |
Epaisseur de la couche d'isolant 27 | 2000 Å |
Epaisseur des pistes conductrices en polysilicium formant les moyens de connexion des électrodes | 1500 Å |
Epaisseur des électrodes | 3000 Å |
Epaisseur de la membrane de diffusion | 50 µ |
Epaisseur de la barrière en polysiloxane | 200 µ. |
représenté sur les figures 8 et 9. Le dispositif de mesure peut facilement être mis en place dans la tuyauterie ou en être ôté en agissant sur le robinet 82, sans que le liquide ne s'échappe de la tuyauterie.
Claims (10)
- Dispositif capteur ampérométrique, pour la mesure de la teneur d'une substance oxydoréductible dans un liquide, comprenant en combinaison un capteur (21) ayant une structure planaire obtenue par des techniques photolithographiques et un circuit (22) pour mesurer l'intensité du courant électrochimique engendré par ledit capteur (21), ladite structure comprenantun substrat isolant (23 à 25),un jeu d'électrodes composé d'une électrode de travail (29) , d'une contre-électrode (30) et d'une électrode de référence (31), au moins ladite électrode de travail (29) étant configurée sur ledit substrat isolant (23 à 25),une membrane de diffusion (32) déposée sur une partie dudit substrat (23 à 25), etdes moyens de connexion (26) pour relier lesdites électrodes (29,30,31) audit circuit de mesure (22),ladite membrane de diffusion recouvre entièrement et uniquement la partie conductrice active de ladite électrode de travail (29) en débordant par toute sa zone périphérique, eten ce que ladite membrane de diffusion (32), ladite électrode de référence (31) et ladite contre-électrode (30) sont entièrement exposées pour qu'au cours du fonctionnement dudit dispositif (20), elles soient en contact par toute leur surface avec le liquide à analyser.
- Dispositif ampérométrique suivant la revendication 1, caractérisé en ce que lesdits moyens de connexion (26) comportent au moins un conducteur (26a, 26b) relié à ladite électrode de travail (29) et passant dans ledit substrat isolant à un niveau sous-jacent à la surface active de celle-ci, en s'étendant au moins au-delà de la périphérie de ladite membrane de diffusion (32).
- Dispositif ampérométrique suivant l'une des revendications 1 et 2, caractérisé en ce que l'électrode de travail (29) a une forme essentiellement circulaire.
- Dispositif ampérométrique suivant la revendication 3, caractérisé en ce que ladite contreélectrode (30) et/ou ladite électrode de référence (31) sont de forme arquée et placée concentriquement autour de l'électrode de travail (29).
- Dispositif ampérométrique suivant l'une quelconque des revendications précédentes, caractérisé en ce que ledit jeu d'électrodes (29, 30, 31) est entouré d'une garniture d'étanchéité (33) fixée sur ledit substrat, et en ce que lesdits moyens de connexion comprennent des contacts (26d, 26h, 26m) de liaison avec ledit circuit de mesure (22) situés à l'extérieur du périmètre de ladite garniture d'étanchéité (33) à la surface dudit substrat (23).
- Dispositif ampérométrique suivant l'une quelconque des revendications 1 à 5, caractérisé en ce que ledit capteur (75) est monté sur un circuit imprimé (74) monté à son tour dans un tube métallique (72) formant blindage et traversé par une partie (71) des moyens de connexion.
- Dispositif ampérométrique suivant l'une quelconque des revendications 1 à 5, caractérisé en ce que ledit capteur (21) est logé dans un boítier (90) ayant la forme d'un boítier d'encapsulation normalisé pour circuits intégrés.
- Dispositif ampérométrique suivant l'une des revendications 1 à 5, et 7, caractérisé en ce qu'il comprend un ajutage cylindrique (92) à deux canalisations concentriques (93, 94) destinées respectivement à communiquer avec une entrée et une sortie de liquide à analyser, et en ce qu' il comprend également un support (90) agencé pour maintenir ledit ajutage (92) en appui sur ladite garniture d'étanchéité (33) par l'une des extrémités de sa canalisation externe (94).
- Dispositif ampérométrique suivant l'une quelconque des revendications précédentes, caractérisé en ce que ladite électrode de travail comporte plusieurs éléments (41a à 41d) répartis sur ledit substrat (40) et en ce que ladite membrane de diffusion comporte plusieurs éléments (42a à 42d) recouvrant respectivement les éléments (41a à 41d) de ladite électrode de travail en débordant individuellement par rapport à ces éléments d'électrode.
- Dispositif ampérométrique suivant l'une quelconque des revendications précédentes, caractérisé en ce que ladite électrode de travail (51) est en forme de peigne.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9210740A FR2695481B1 (fr) | 1992-09-07 | 1992-09-07 | Dispositif de mesure ampérométrique comportant un capteur électrochimique. |
FR9210740 | 1992-09-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0586982A1 EP0586982A1 (fr) | 1994-03-16 |
EP0586982B1 true EP0586982B1 (fr) | 1998-07-08 |
Family
ID=9433330
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93113710A Expired - Lifetime EP0586982B1 (fr) | 1992-09-07 | 1993-08-27 | Dispositif de mesure ampérométrique comportant un capteur électrochimique |
Country Status (8)
Country | Link |
---|---|
US (1) | US5393399A (fr) |
EP (1) | EP0586982B1 (fr) |
JP (1) | JP3292938B2 (fr) |
AT (1) | ATE168195T1 (fr) |
CA (1) | CA2105510C (fr) |
DE (1) | DE69319516T2 (fr) |
ES (1) | ES2121041T3 (fr) |
FR (1) | FR2695481B1 (fr) |
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US6413410B1 (en) | 1996-06-19 | 2002-07-02 | Lifescan, Inc. | Electrochemical cell |
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FR2764385B1 (fr) * | 1997-06-06 | 1999-07-16 | Commissariat Energie Atomique | Microsysteme d'analyse de liquides a cuvette integree |
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CN1920548B (zh) | 2001-10-10 | 2013-05-29 | 生命扫描有限公司 | 一种制造电化学电池的方法 |
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JP4758752B2 (ja) * | 2005-12-16 | 2011-08-31 | 日本電信電話株式会社 | pH電極 |
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US8778168B2 (en) | 2007-09-28 | 2014-07-15 | Lifescan, Inc. | Systems and methods of discriminating control solution from a physiological sample |
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US8603768B2 (en) | 2008-01-17 | 2013-12-10 | Lifescan, Inc. | System and method for measuring an analyte in a sample |
US8551320B2 (en) | 2008-06-09 | 2013-10-08 | Lifescan, Inc. | System and method for measuring an analyte in a sample |
EP2241882A1 (fr) | 2009-04-15 | 2010-10-20 | Neroxis SA | Capteur électrochimique ampérométrique et son procédé de fabrication |
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DE102014112972A1 (de) * | 2013-09-12 | 2015-03-12 | Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG | Messmembran für einen optochemischen oder amperometrischen Sensor |
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US3791953A (en) * | 1972-10-31 | 1974-02-12 | Atomic Energy Commission | Self-sealing electrochemical oxygen meter |
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US4900405A (en) * | 1987-07-15 | 1990-02-13 | Sri International | Surface type microelectronic gas and vapor sensor |
US4812221A (en) * | 1987-07-15 | 1989-03-14 | Sri International | Fast response time microsensors for gaseous and vaporous species |
KR960009768B1 (ko) * | 1987-07-28 | 1996-07-24 | 야마다 미노루 | 가연성 가스센서 |
US4948490A (en) * | 1988-02-19 | 1990-08-14 | Honeywell Inc. | Tetraalkylammonium ion solid electrolytes |
DE68924026T3 (de) * | 1988-03-31 | 2008-01-10 | Matsushita Electric Industrial Co., Ltd., Kadoma | Biosensor und dessen herstellung. |
GB8817421D0 (en) * | 1988-07-21 | 1988-08-24 | Medisense Inc | Bioelectrochemical electrodes |
-
1992
- 1992-09-07 FR FR9210740A patent/FR2695481B1/fr not_active Expired - Fee Related
-
1993
- 1993-08-27 AT AT93113710T patent/ATE168195T1/de not_active IP Right Cessation
- 1993-08-27 EP EP93113710A patent/EP0586982B1/fr not_active Expired - Lifetime
- 1993-08-27 DE DE69319516T patent/DE69319516T2/de not_active Expired - Fee Related
- 1993-08-27 ES ES93113710T patent/ES2121041T3/es not_active Expired - Lifetime
- 1993-09-03 CA CA002105510A patent/CA2105510C/fr not_active Expired - Fee Related
- 1993-09-07 US US08/117,872 patent/US5393399A/en not_active Expired - Fee Related
- 1993-09-07 JP JP24623993A patent/JP3292938B2/ja not_active Expired - Fee Related
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2012288825B2 (en) * | 2011-07-25 | 2015-10-22 | Veolia Eau - Compagnie Generale Des Eaux | Device for measuring the free chloride content of water |
US10620151B2 (en) | 2016-08-30 | 2020-04-14 | Analog Devices Global | Electrochemical sensor, and a method of forming an electrochemical sensor |
US11268927B2 (en) | 2016-08-30 | 2022-03-08 | Analog Devices International Unlimited Company | Electrochemical sensor, and a method of forming an electrochemical sensor |
US11022579B2 (en) | 2018-02-05 | 2021-06-01 | Analog Devices International Unlimited Company | Retaining cap |
US11959876B2 (en) | 2018-02-05 | 2024-04-16 | Analog Devices International Unlimited Company | Retaining cap |
Also Published As
Publication number | Publication date |
---|---|
JP3292938B2 (ja) | 2002-06-17 |
DE69319516D1 (de) | 1998-08-13 |
FR2695481A1 (fr) | 1994-03-11 |
CA2105510A1 (fr) | 1994-03-08 |
DE69319516T2 (de) | 1999-03-04 |
ATE168195T1 (de) | 1998-07-15 |
FR2695481B1 (fr) | 1994-12-02 |
CA2105510C (fr) | 2004-03-16 |
JPH06213863A (ja) | 1994-08-05 |
ES2121041T3 (es) | 1998-11-16 |
US5393399A (en) | 1995-02-28 |
EP0586982A1 (fr) | 1994-03-16 |
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